IE 900 - The precision-manufactured aluminum housing of the IE 900 faithfully protects the dynamic TrueResponse transducers at the heart of Sennheiser’s innovative X3R technology. Experience the peak of German audio engineering and manufacturing with earphones that deliver only the purest, most natural sound.
- New benchmark in portable audio
- Ultimate precision & craftsmanship
- Made in Germany
- X3R technology: TrueResponse transducer combined with three Helmholtz resonator chambers and acoustic vortex
- Precision-milled and anodized aluminum housing
- Hand-assembled at Sennheiser´s headquarters
- Gold-plated Fidelity (+) MMCX connectors for improved stability
- Choice of para-aramid reinforced cables (2.5 mm, 3.5 mm, 4.4 mm)
- Adjustable ear hooks and choice of ear adapters including memory foam
- Frequency response: 5 Hz - 48,000 Hz
- THD: 0.05% (1 kHz, 94 dB)
- Impedance: 16 ohms
The IE 900 — goodbye to tradeoffs
High-fidelity recordings are pieces of art. Just as with a valuable painting, it would be a disgrace to allow damage during transport. The IE 900 reveals the true potential of any recording. If it’s a masterpiece, you’ll hear it. Brilliant, sparkling treble — with no trace of sibilance. Powerful lows without creating muddy mids. An uncanny ability to resolve fine detail — alongside warmth and comfort for extended sessions.
All these qualities derive from inspired feats of engineering. Take Sennheiser’s trusted 7 mm transducer, for instance. We’ve made it just that much better for the IE 900. Or the all-new X3R triple-chamber absorber technology milled right into the solid aluminum core with its downstream acoustic vortex. Taken together, these innovations deliver a unique level of balance and transparency — so you never have to compromise again.
Explore every last detail
Considerable effort goes into capturing the finest nuances of a musical performance. Re-living the creativity and texture recorded in the studio or concert hall can be a source of great pleasure. But only if the listener’s playback equipment allows. Our German-engineered and manufactured TrueResponse driver ensures exceptionally natural reproduction. A large part of its very precise transient response comes from the unique combination of materials in the diaphragm together with its high inner dampening. So when the signal stops, the sound stops too. This is how the IE 900 can reveal details in tracks you thought you knew inside out.
But the only thing that counts is what you, the listener, hear. The tonality of each instrument becomes clearly audible. And it’s not just the skills of the musicians that the IE 900 reveals. Even the acoustic properties of the room gain a new presence. Instead of remaining on the surface, you can now dive deep into complex passages — all while immersed in a breathtaking sound stage.
A new level of clarity
In developing the IE 900, we faced a fundamental choice. The inherent compromises multi-driver systems require (phase issues and the resulting distortion in overlapping frequency bands) made the decision easy. There would be a single dynamic driver only — of the highest quality, of course.
To get exactly the sound we were looking for, we designed a sophisticated system of three Helmholtz resonators — the X3R. It’s milled right into the solid aluminum housing of each earphone. These tiny channels eliminate resonance peaks which, in less advanced products, can color the sound signature and alter the feel of your music. In addition, a complex structure in the nozzle of each earphone — the Vortex — swirls acoustic energy in these frequency bands to smooth out peaks.
An acoustic back-volume establishes balance
Our goal was to achieve a transparent sound with no distracting peaks or troughs. One thing this requires is clear separation of lows and mids. To ensure accuracy across this critical frequency band, we’ve employed what is known as an acoustic back volume. It’s a small chamber within a chamber we have tuned to manage the slope and amplitude of the base lift. The way the back volume helps achieve such a clear and natural sound signature is by controlling the direction and overall volume of air as it moves through the transducer system. What you hear is a pleasantly disciplined bass and mid-range experience. Unpleasant resonances and listening fatigue vanish in this small space with a big effect.
The sound of manufacturing expertise
We build the IE 900 exclusively at our famed German manufacturing facility. It’s the source of the outstanding quality Sennheiser products are known for the world over. Aluminum was the material of choice for this application. Well-suited to high-precision milling, it also provides an aesthetically pleasing, long-lasting home for electro-acoustic components. A five-axis CNC machine precision cuts each housing individually from a single block of aluminum. The result is truly a work of art. Once anodized, the housing is highly resistant to wear and corrosion — music to the ears of any daily listener. The drivers in each pair of IE 900s are matched during our automated manufacturing process to practically eliminate variance. The result? A transparent soundstage with no gaps or holes.
A precise fit for precise sound
Working musicians rely on high-quality, form fitting earphones known as personal monitoring systems. But we felt the privilege of enjoying perfect live sound should not be the exclusive right of the performers of the world. So, we took the comfort and secure fit of these professional solutions as inspiration for the IE 900. Now you can enjoy a fit and quality that rival that experienced by the artists who create your music. Included with the IE 900 are silicone ear adapters and three elastic foam ear adapter sets in three different sizes. They adapt to the natural shape of your ear for a tailored fit. We’ve all been there: an amazing piece of music spoiled by a recurring bass note that happens to match the resonant frequency of your loudspeakers or headphones. Or rough treble sibilance that makes longer sessions uncomfortable. Such obvious deficiencies are unthinkable with the IE 900. All you will hear is precisely what the artist intended. They’re perfect at your desk, on a train, or taking a walk through the woods. Never have a listening session spoiled by your earphones again.
It pays to have good connections
In addition to outstanding sound, audiophiles appreciate durable products that are made to last. Here as well, the IE 900 excels.
Gold-plated Fidelity+ MMCX connectors ensure perfect contact. Each termination is seated within a recessed, 4.8 mm-wide socket below the surface of the housing, providing strain relief. The cables themselves are para-aramid reinforced to withstand many thousands of bend cycles. But they don’t have to when protected in the included serialized case.
Connect to practically any digital audio source with the 3.5 mm stereo plug including headphone amps, laptops, and audio interfaces. Each pair of IE 900s also includes symmetrical 2.5 mm and 4.4 mm cables for plugging directly into hi-fi components with balanced outputs. Because when you’re looking for the most natural and immersive sound, every detail matters.
What's in the box?
- IE 900 in-ear headphones
- Balanced para-aramid reinforced cable with 2.5mm connector
- Unbalanced para-aramid reinforced cable with 3.5mm connector
- Balanced para-aramid reinforced cable with 4.4mm connector
- 3 pairs of silicone ear adapters (S, M, L)
- 3 pairs of foam ear adapters (S, M, L)
- Premium carry case with metal serial no. plate
- Cable clip, Cleaning tool & Cleaning cloth
- Presentation box with signed customer certificate & User manuals
- Impedance: 16 Ω
- Sound pressure level (SPL): 123 dB (1 kHz, 1 Vrms)
- THD, total harmonic distortion: <0.05% (94 dB, 1 kHz)
- Cable length: 125 cm
- Transducer principle: single dynamic driver, pressure chamber
- Weight: 4 g
- Technology: unique X3R technology
- Housing: One-piece precision-milled aluminum housing
- Warranty: global 2-year warranty
- Connector: Fidelity (+) MMCX
- Frequency response: 5 Hz – 48,000 Hz (-10 dB)
When Taron and Andrew Lissimore started headphones.com, they wanted to create the headphone store they wished existed. As headphone enthusiasts, they wanted a store with 365-day returns.
So they decided they were going to try to make 365-day returns work - no matter how ridiculous it sounded to their wives.
Years later, they're still doing it, and their wives still think they're crazy.
So take some time to get to know your new gear. We want you to enjoy your purchase for years, not just a few weeks. If you're not satisfied, you can return items in like-new condition for up to 365-days.
How To Make a Return
1. Follow the link below.
To get the return process started, you just need to click this link. Enter your order number as well as e-mail address to get it started and after that just follow the steps outlined in the portal (note open-box, special order and sale items are not eligible). A pre-paid shipping label will be generated for you a deducted from your refund after being processed.
After receiving your return label, you will have 7 days to drop off your return with the courier. If your return is not dropped off within 7 days of receiving your return label, a 30% restocking fee will occur. If your return is not dropped off within a month of your label being issued, your return will be rejected.
2. Pack Your Items Carefully
Your item must be in like-new condition with its original packaging. It must also include all original accessories and manuals. Please add a larger shipping box to protect the original packaging during shipping.
Important Refund Details
Refund or Exchange
You may choose either a refund or an exchange for the full cost of the item. The refund will be processed on the same method of payment you used to make the original purchase.
A pre-paid shipping label is generated for you. It is deducted from the final refund total after inpsection.
If you are returning a defective product, the product must be repaired under manufacturer's warranty before a refund is issued. If the manufacturer claims the product cannot be repaired under warranty due to damage outside of warranty, the product will be returned to you and no refund will be issued.
Like New Condition
Headphones.com may refuse a return or charge a restocking fee if the items are not complete and in like-new condition. Here are some examples of returns that would incur a restocking fee:
- The returned item is missing accessories or parts that were included with the original product
- There are obvious signs of wear (scratches, dirt, worn out parts etc.)
Here are some examples of returns that may be refused:
- The serial number on the returned product is different from the serial number that was originally shipped.
- The item has been damaged through mishandling (water damage, drop damage etc.)
Special order, sale and open-box items are not covered by our 365-day return policy. However they are usually covered by the manufacturers warranty.
Special order items are non-cancellable and non-returnable. The estimated shipping window is just an estimate, your item may ship sooner or later than the estimate.
Accessories such as ear pads and ear tips are final sale and not returnable due to hygienic reasons.
All fees are cumulative.
5% on Affirm orders. All other orders have no cancellation fees with one exception.
Return shipping is paid by the customer.
10% Restocking Fee
Products with Batteries
15% restocking fee.
Returned products that have been damaged cannot be returned. Regular wear and tear is expected. Each return is inspected and tested.
10% restocking fee.
Returns with missing accessories
20% restocking fee.
Bundled Item Return
All items from the bundle must be returned. If an item is missing, retail value for the item will be deducted.
Return of a purchase with a missing or damaged free item
Retail value of the missing/damaged gift items.
Return of more than 2 items in a 365-Day Period
25% restocking fee on each additional return.
Open-Box, Sale, Final Sale and Special Order
These items are final sale however the manufacturers warranty still applies
Return Policy Abuse
In order to provide a 365-day return policy, we need to take abuse seriously.
We monitor a buyers ratio of purchased to returned products. If it exceeds an internal threshold they will no longer be allowed to place orders with Headphones.com. This includes customers who spread returns across multiple accounts.
We made our return policy to help you find gear you feel great about for a long time. Most people use it exactly as intended. We don't want the handful of people who attempt to abuse our policy to ruin it for everyone else.
If you paid with a cryptocurrency, the returned amount will be equal to the USD equivalent of your payment on CoinGecko.com at the time the refund is processed. The return will be made in the currency of your original order.
After You've Made a Return
Each return is inspected at our warehouse. During busy times these inspections may take a few extra days.
Refund or Credit
We will notify you by email when your refund or credit has been processed. It may take a few business days for a refund to appear in your account. This is determined by your financial institution.
If you still have questions, please email email@example.com and an advisor will be happy to help.
One of the key things we pride ourselves on is our customer service and one of the most important aspects of our customer service is getting you your product on time! But not only do we want to get it to you on time, we want to make sure we are using a reliable courier so the experience for you is the best possible. That is why we ship all of our orders with FedEX.
While couriers like USPS are tempting because of their low cost, we have found that they are not a good experience for our customers. Nobody wants their package to not be delivered and then have to spend an hour on hold with the local post office trying to get information. To that end, all of our packages are shipped signature required with FedEX to make sure your package arrives in your hands safe and sound and if there are any issues, your time isn't wasted.
However, if you are looking to ship to PO Box or APO address, we can definitely accommodate your shipping needs!
How Much Does Shipping Cost?
Shipping in the continental US is free if your order is over $100, no matter what (you do always have the choice to upgrade your shipping at checkout as well).
Canadian orders over $250 are eligible for free shipping. Duties & Taxes are not included but you can choose to pay Duties & Taxes during checkout with DHL.
Due to our vendor agreements with the brands that we carry, we are unable to ship outside of the United States or Canada.
FedEX Ground Shipping
All orders $100 or over & under $300 qualify for free FedEX Ground shipping.
FedEX 2-Day Shipping
All orders between $300 - $999,99 get free FedEX 2-Day shipping.
All orders over $1000 qualify for free FedEX Overnight shipping. Overnight shipping is covered under FedEX as the next business day. Saturday and Sunday deliveries are not part of their guaranteed overnight delivery.
All orders shipped through Headphones.com are shipped with signature required. Since most signature requirements have been suspended during COVID-19, we are shipping orders with an Adult Signature Required.
How Soon Will My Order Ship
We strive for every item we have on the website to be in stock and ready to ship the same day. So if your order is in stock and you place your order before 1pm PST, it will ship that same day.
Sometimes, we like to give our customers the opportunity to place orders on backordered items or pre-orders. In those situations, it will be clearly written on the page that the product is backordered or available for pre-order. When the item is back in stock, it will ship out with the FedEX shipping methods above.
Questions About Shipping
If you have any questions about shipping or any other concerns, always feel free to reach out to us via our Live Chat located at the bottom right corner of your screen or by E-mail at firstname.lastname@example.org
Paying with Cryptocurrency is easy at Headphones.com!
The simplest way to pay is by simply going through our checkout process. After entering your shipment details and choosing your preferred shipping method, you will be able to select your payment method. From there you will have the choice to pay with a variety of different cryptocurrencies.
If you don't see the currency you're looking to pay with or would prefer a manual quote, please feel free to e-mail us at email@example.com and we will be happy to help!
Payment & Security
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
Payment & Security
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.